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heeling error — noun Etymology: from present part of heel (III) : a deviation of a compass due to a ship s heeling which causes vertical magnetic forces to have a horizontal component and transverse horizontal magnetic forces to have a vertical component … Useful english dictionary

Flinders bar — A Flinders bar is a vertical soft iron bar placed in a tube on the fore side of a compass binnacle. The Flinders bar is used to counteract the vertical magnetism inherent within a ship and is usually calibrated as part of the process known as… … Wikipedia

Jibe — A jibe or gybe is a sailing maneuver where a sailing vessel turns its stern through the wind, such that the wind direction changes from one side of the boat to the other. For square rigged ships, this is called wearing ship and involves bringing… … Wikipedia

sailing — /say ling/, n. 1. the activity of a person or thing that sails. 2. the departure of a ship from port: The cruise line offers sailings every other day. 3. Navig. any of various methods for determining courses and distances by means of charts or… … Universalium